BS EN 60534-8-1-2005 Industrial-process control valves - Part 8-1 Noise considerations - Laboratory measurement of noise generated by aerodynamic flow through control valves《工业过程控制.pdf

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1、BRITISH STANDARDBS EN 60534-8-1:2005Industrial-process control valves Part 8-1: Noise considerations Laboratory measurement of noise generated by aerodynamic flow through control valvesThe European Standard EN 60534-8-1:2005 has the status of a British StandardICS 23.060.40; 17.140.20; 25.040.40g49g

2、50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Tue May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSIBS EN 60534-8-1:200

3、5This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 February 2006 BSI 1 February 2006ISBN 0 580 47390 2National forewordThis British Standard is the official English language version of EN 60534-8-1:2005. It is identical with IEC 60534-8-1:200

4、5. It supersedes BS EN 60534-8-1:2001 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee systems, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the inter

5、pretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which i

6、mplement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication

7、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN

8、title page, pages 2 to 17 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of Licensed Copy: Wang Bin, na, Tue

9、May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60534-8-1 NORME EUROPENNE EUROPISCHE NORM November 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Se

10、cretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60534-8-1:2005 E ICS 23.060.40; 17.140.20; 25.040.40 Supersedes EN 60534-8-1:2000English version Industrial-process control valv

11、es Part 8-1: Noise considerations - Laboratory measurement of noise generated by aerodynamic flow through control valves (IEC 60534-8-1:2005) Vannes de rgulation des processus industriels Partie 8-1: Considrations sur le bruit - Mesure en laboratoire du bruit cr par un dbit arodynamique travers une

12、vanne de rgulation (CEI 60534-8-1:2005) Stellventile fr die Prozessregelung Teil 8-1: Geruschbetrachtungen - Laboratoriumsmessungen von Geruschen bei gasdurchstrmten Stellventilen (IEC 60534-8-1:2005) This European Standard was approved by CENELEC on 2005-09-01. CENELEC members are bound to comply w

13、ith the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secreta

14、riat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the

15、 official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, S

16、lovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Tue May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSIForeword The text of document 65B/558/FDIS, future edition 2 of IEC 60534-8-1, prepared by SC 65B, Devices, of IEC TC 65, Industrial-process measurement and co

17、ntrol, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60534-8-1 on 2005-09-01. This European Standard supersedes EN 60534-8-1:2000. This standard has been revised to obtain consistency in describing the methods for measuring internal and external sound pressure meas

18、urements and to update the description of the instrumentation from analog to digital. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-07-01 latest date by which the natio

19、nal standards conflicting with the EN have to be withdrawn (dow) 2008-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60534-8-1:2005 was approved by CENELEC as a European Standard without any modification. _ EN 60534-8-1:2005 2 Licensed Copy:

20、 Wang Bin, na, Tue May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSI 3 EN 60534-8-1:2005 CONTENTS 1 Scope 4 2 Normative references .4 3 Terms and definitions .5 4 Symbols .5 5 Method A (external sound pressure measurement) 6 5.1 Test system.6 5.1.1 Pressure regulating devices .6 5.1.2 Test specim

21、en .6 5.1.3 Test section piping.6 5.1.4 Pressure taps 7 5.1.5 Acoustic environment.7 5.1.6 Instrumentation7 5.2 Test procedure 7 5.2.1 Test fluids7 5.2.2 Sound level sensor position7 5.2.3 Blow-down test limitations 7 5.2.4 Test data accuracy.8 5.2.5 Test data .8 5.2.6 Accuracy9 5.3 Data evaluation

22、.9 6 Method B (internal sound pressure measurement).12 6.1 Test system.12 6.1.1 Pressure regulating devices .12 6.1.2 Test specimen .13 6.1.3 Test section piping.13 6.1.4 Pressure taps 13 6.1.5 Number of measuring points.13 6.1.6 Instrumentation for noise measurement 13 6.2 Testing procedures14 6.2.

23、1 Test fluid .14 6.2.2 Fluid velocity14 6.2.3 Background noise 14 6.2.4 Sound level sensor position14 6.2.5 Blow-down test limitations 15 6.2.6 Test data accuracy.15 6.2.7 Test data .15 6.2.8 Accuracy16 6.3 Data evaluation .16 Annex ZA (normative) Normative references to international publications w

24、ith their corresponding European publications17Figure 1 Control valve noise test System components9 Figure 2 Test arrangements .11 Figure 3 Arrangement of a test stand (principle) .12 Figure 4 Mounting position of the sound level meter in the pipe for h 0,5 mm 14 Licensed Copy: Wang Bin, na, Tue May

25、 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSIEN 60534-8-1:2005 4 INDUSTRIAL-PROCESS CONTROL VALVES Part 8-1: Noise considerations Laboratory measurement of noise generated by aerodynamic flow through control valves 1 Scope This part of IEC 60534-8 defines equipment, methods, and procedures for o

26、btaining laboratory measurements of sound pressure levels radiated by control valves and/or associated piping configurations, including fixed restrictions, through which compressible fluids are passing. Control valves discharging to atmosphere are excluded from this standard. Method A is a uniform m

27、ethod of measuring the radiated noise from the valve and associated test piping and allows a comparison of various measuring results which is beneficial for both user and manufacturer. The noise criteria are expressed by determining the sound pressure level of the valve under consideration. Method B

28、 is a procedure for measuring the sound pressure levels within pipe systems upstream and downstream of the valve under fixed operating conditions. Since inaccuracies due to the pipe transmission are eliminated, this method is preferred for evaluation of the acoustical characteristic of valves. The n

29、oise characteristics to be determined are useful for the following reasons: a) to compare the performance of different valves; b) to plan measures for noise abatement; c) to determine acoustical characteristics of valves and valve assemblies; d) to enable proper sizing of sound absorbers; e) to dete

30、rmine possible adverse effects on ultra-sonic flow meter measurements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced

31、document (including any amendments) applies. IEC 60534-1, Industrial-process control valves Part 1: Control valve terminology and general considerations IEC 60534 (all parts), Industrial-process control valves IEC 60534-2-3, Industrial-process control valves Part 2-3: Flow capacity Test procedures I

32、EC 60534-8-3, Industrial-process control valves Part 8-3: Noise considerations Control valve aerodynamic noise prediction method Licensed Copy: Wang Bin, na, Tue May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSI 5 EN 60534-8-1:2005 IEC 61260, Electroacoustics Octave-band and fractional-octave-ban

33、d filters IEC 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over reflecting plane ISO 3745:2003, Acoustics Determination of so

34、und power levels of noise sources Precision methods for anechoic and hemi-anechoic rooms 3 Terms and definitions For the purposes of this document, the following terms and definitions, as well as those given in IEC 60534-1 and other parts of IEC 60534, apply. 3.1 test specimen any valve or combinati

35、on of valve, reducer, expander, or other fittings for which test data are required NOTE During blow-down testing a closure mechanism should be used in such a way that the closure member position does not change during blow-down. 3.2 blow-down rate rate at which the inlet pressure to the test specime

36、n changes NOTE In the blow-down method of testing, the inlet pressure to the test specimen decays during the test period. 4 Symbols Symbol Description Unit C Flow coefficient (Cv, Kv) Various (see IEC 60534-1) FpPiping geometry factor 1 LpiInternal sound pressure level at pipe wall dB(ref Po) m b) t

37、est specimen; c) test section piping; d) pressure taps; e) noise-attenuating devices (optional); f) means of controlling the acoustic environment (chamber is optional); g) instrumentation. Alternative test arrangements are shown in Figures 2a and 2b. 5.1.1 Pressure regulating devices Upstream and/or

38、 downstream pressure regulating devices are used to regulate the test pressures. Caution should be taken to avoid pressure drops which will create significant stream-borne noise. If such pressure drops are unavoidable, the use of silencers (see 5.1.5) is recommended as shown in Figure 1. Flowmeters

39、should be installed in accordance with the manufacturers instructions. 5.1.2 Test specimen The test specimen and test section shall not be insulated. However, separate tests may be conducted to determine the effects of pipe and/or valve insulation. 5.1.3 Test section piping There is no limitation co

40、ncerning the maximum length of downstream and upstream piping connected to the test specimen. The exposed downstream or upstream pipe within the acoustic environment shall be of one-piece construction, i.e., no flanges, circumferential joints or other pipe-wall reinforcements, and at least 2 m in le

41、ngth. This applies to the downstream pipe when conducting downstream noise tests and to the upstream pipe when conducting upstream noise tests. Any mismatch between the inlet and outlet diameters of the test specimen and the inside diameter of the adjacent piping shall be minimized as far as practic

42、al. Non-insulated pipe shall be used. Pipe material and pipe wall thickness shall be reported in the test data. Licensed Copy: Wang Bin, na, Tue May 09 08:18:40 BST 2006, Uncontrolled Copy, (c) BSI 7 EN 60534-8-1:2005 5.1.4 Pressure taps Pressure taps shall be provided for the measurement of pressur

43、es. They shall conform to IEC 60534-2-3. 5.1.5 Acoustic environment The test environment shall be controlled in such a way that background, reflected, and other extraneous noise be at least 10 dB lower than that radiated by the test section. Depending on the test system and the acoustic environment,

44、 upstream and downstream silencers may be necessary. General considerations for the acoustic environment can be found in ISO 3744 and ISO 3745. No sound pressure level correction shall be made for the presence of extraneous noise. 5.1.6 Instrumentation The instrumentation for sound pressure level me

45、asurement shall conform to IEC 61672-1, Class 1 or Class 2. Sound level meter characteristics shall conform to IEC 61672-1, Table 2 (weighting A). Sound level meter calibration and sensitivity test results shall be corrected to sea-level conditions. Additional instrumentation such as electronic reco

46、rding devices and computers shall not cause errors in the measured data of more than 1 dB. 5.2 Test procedure 5.2.1 Test fluids Air is the preferred fluid to be used in the test procedures. However, other compressible fluids may be substituted for air. The fluid shall be sufficiently dry to ensure t

47、hat any icing which may take place does not affect the test results. Saturated vapours are not acceptable as test fluids unless the saturated vapour being used is the one for which data are required. 5.2.2 Sound level sensor position The sound level sensor shall be located 1 m from the nearest pipe

48、surface. The downstream distance shall be a minimum of 1 m from the beginning of the exposed section of the test piping but not less than six nominal pipe diameters downstream of the test specimen outlet (see Figures 2a and 2b). Orientation of the sound level sensor with respect to the piping shall

49、be in accordance with the requirements of the sound level meter manufacturer. 5.2.3 Blow-down test limitations Blow-down test results are intended to simulate steady-state results. When using the blow-down method of testing, the blow-down rate shall be limited so that the time interval during which acoustical data are obtained shall be at least 10 times as long as the response time of the acoustical instrumentation. The blow-down rate shall be further limited so that the inlet pres